Infrastructure for abundant intelligence

The most efficient inference for
long-horizon agents

Sail is the most cost-efficient API for the best open-source models.

Unbeatable pay-per-token pricing, with $5 in monthly free credits.

Kimi K3GLM-5.3GLM-5.3-FlashDeepSeek V4.1 Flash 1017DeepSeek V4 Pro 0813DeepSeek V4 Flash 0731Gemma 4 31B ITGemma 4 31B IT (NVFP4)Gemma 4 12B ITQwen3.6 35B A3BKimi K3GLM-5.3GLM-5.3-FlashDeepSeek V4.1 Flash 1017DeepSeek V4 Pro 0813DeepSeek V4 Flash 0731Gemma 4 31B ITGemma 4 31B IT (NVFP4)Gemma 4 12B ITQwen3.6 35B A3B

Get started free See all models & pricing

Pay ~70% less for tokens

by default, using our drop-in API

(Same model vs. traditional inference provider)

FasterCost-efficient

defaultbalancedflex

Input

$0.09

Cached

$0.006

Output

$0.30

DeepSeek V4.1 Flash
USD / 1M tokens

quickstart.py▶ Run

from openai import OpenAI

client = OpenAI(
    base_url="https://api.sailresearch.com/v1",
    api_key="YOUR_SAIL_API_KEY",
)

response = client.responses.create(
    model="deepseek-ai/DeepSeek-V4.1-Flash-1017",
    input="Plan and run a deep research report.",
)

Introducing

The Completion Window

Completion windows can be specified per request, allowing you to indicate your latency tolerance and drastically cut token costs for the same intelligence.

WindowSchedulingTypical use casePrice vs. other providers

default (asap)Low-latency servingInteractive UIs, human-in-the-loop30–70% less

balancedWider scheduling windowBackground agents, subagents, and pipelines45–80% less

flexBest-effort schedulingBackground agents, routines, batch jobs, RL rollouts, evals55–85% less

See pricing Read more

Drop-in APIs

OpenAI- and Anthropic-compatible (Responses, Chat Completions, and Messages APIs). Migrate to Sail in minutes.

Fine-tunes and RL Rollouts

Serve your own LoRA fine-tunes and run RL rollouts on Sail’s sampling path. Drop-in Tinker integration.

Usage-based, pay-per-token

Send requests immediately and pay as you go, with $5 in free credits every month.

Battle-tested

Trillions of tokens served per week, and ready to serve yours.

Scale your workloads without limits

Send us millions, billions, or trillions of tokens. No sales call required.

Sail is designed to absorb large bursts of traffic, so you can scale on your schedule.

Trusted by teams at the frontier

Web search & research APIs for AI agents

AI-powered code review

Your AI career agent

AI agent workforce for research

“We and Sail share a belief that background agents are about to do far more useful work. Getting there takes efficient, scalable inference paired with the highest-quality context, including from the web. Sail is building the inference side of that, and we’re glad to be aligned on where this is going.”

Travers Nisbet, Co-founder, Parallel

“Building on Sail lets us ship long-horizon agents with great economics. Trillions of tokens and counting — we’re happy customers.”

Dan Robinson, CEO, Detail.dev

The pursuit of token abundance.

We curate the best open-source models and invest in serving them as efficiently as physically possible, on the full latency vs. cost curve.

From CUDA to scheduling, we ensure no compute goes to waste, and no token costs more than it should.

Because more agents, with more intelligence, can do incredible things.

Our why and how

Pricing plans

A few ways to Sail.

Self-Serve

Freeto start, pay-as-you-go

Get your API key, and let the tokens flow.

Get started with $5 free credit

$5 in free credits every month when you attach a payment method

Usage-based pricing with prepaid credits

Up to 4 seats

200 reserved vCPUs across active Sailboxes

Support via email and the Sail Research Community Slack

Pro

$250/month

Expanded access once you’re ready.

$100 in included credits every month, plus $150 in your first month

Usage-based pricing with prepaid credits

Unlimited seats

Increased model capacity and higher rate limits

10,000 reserved vCPUs across active Sailboxes

Sailbox creation fees waived for all sizes

US-only inference (20% surcharge)

30-day usage history and 24-hour request history

Priority support via email and the Sail Research Community Slack

Enterprise

Custom

Workloads at extreme scale.

Talk to us

Volume pricing, billed monthly in arrears

HIPAA support with a signed BAA

Signed MSA and DPA

US-only inference (10% surcharge)

Full usage history through the API, subject to retention

Custom model bringups

Uptime and latency SLAs

Early access to new features

Dedicated support via a private Slack channel

All additional Pro benefits

Every agent needs a computer

Sailboxes are full VMs that give long-horizon agents compute they can run indefinitely, with wonderful economics.

Pair them with Sail inference so your agents can read, write, build, and test for hours, days, or even longer without losing state — and at maximal cost efficiency.

Explore Sailboxes

Ready to build on Sail?

Get started with $5 in free credits every month.

Start for free Contact us